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Frame rate

Anthony Zorzos
Prodigy 200 points
Other Parts Discussed in Thread: DLPC200

We have the LightCommander chipset and would like to deliver arbitrary patterns at a frame rate of 1000Hz.  Is this possible?  If not, would the D4100 kit provide this capability?  Thank you.

  • 0
    TI__Mastermind 30875 points

    Hello Anthony Zoros,

    Welcome to DLP&MEMS forum.

    Could you elaborate more about the pattern bit-depth? 

    Using RGB 24-bit parallel interface it is possible to run 1bitperpixel data at 1440Hz. While the 8-bit grayscale at 180Hz. 

    Regards,

    Sanjeev

  • 0 in reply to Sanjeev
    Prodigy 200 points

    Hi Sanjeev,

    Can you tell me more abut this RGB 24-bit parallel interface?  I'm not sure what you mean by that?  Thanks,

    Anthony

  • 0 in reply to Anthony Zorzos
    TI__Mastermind 30875 points

    Hello Anthony?

    The DLPC200 chip has physical 24bit parallel RGB interface. I am referring to the signal coming from external HDMI connector (carrying DVI signal) to the DLPC200. On Kit the arrangement is HMDI Connector - DVI Receiver chip (o/p 24bit parallel RGB) signal - DLPC200.

    Regards,

    Sanjeev

     

  • 0 in reply to Sanjeev
    Prodigy 200 points

    Hi Sanjeev,

    We want to display 1-bit per pixel images on the DLPC200 chipset at 500-1000 Hz.  It seems like the HDMI is limited to 60 Hz.  This is why we've been using the USB to upload a series of images to the external memory and delivering the series.  Is there a way to directly access the 24-bit interface?  Thanks,

    Anthony

  • 0 in reply to Anthony Zorzos
    Intellectual 750 points

    Anthony,

    I believe what Sanjeev is suggesting is that you create custom 24-bit image files using an external program. From that you can configure the sequence of the DLPC200 to render them one at a time. if you can dial down the frame rate to 24-50 Hz you can achieve your targeted display rate. 

    Regards,

    Adam Kunzman

    Keynote Photonics

  • 0 in reply to Adam Kunzman
    TI__Mastermind 30875 points

    Hi Anthony,

    Adding on to Adam comments. 

    The frame data input to the DLPC200 is in the form of 24bit RGB Parallel interface. So you must need to pack each 1bpp image into the 24bit video frame. So every video frame has place for a total of 24bit 1bpp images.This thread discuss more about it

    http://e2e.ti.com/support/dlp__mems_micro-electro-mechanical_systems/f/387/t/238007.aspx

    Now, if you refer to the DLP LightCommander GUI in the Structured Light mode with DVI mode you can set the pattern exposure time and frame-rate, for example - 1mSec exposure time, you can select incoming frame-rate to 50Hz and then configure DLPC200 to display only 20 bitplanes from the incoming video frame. This will yield (1/50) = 20msec within which 20 bitplanes displayed i.e., 20mSec/20bitplanes = 1mSec pattern display time.

    The important factor here is, you should have the logic to pack 1bpp into 24bit video frame and run it desired frame as explained above. 

    Regards,

    Sanjeev